Using a Frsky module in a Kraft TX

I have a Series 1979 KP5C tx that I would like to update with a Frsky V8HT 2.4 module. Does anyone know:1. Will this work? 2. The Kraft internal frequency module has several wires from it and the Frsky has 3 wires plus the antenna connection. Of course, I can figure out the red and black wires but which wire on the Kraft is the signal in(or out)?Any help will be appreciated!
Frank